Title:
MULTILAYER BIODEGRADABLE FILM AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/027602
Kind Code:
A1
Abstract:
Disclosed is a multilayer biodegradable film, composed of a surface layer, a core layer, and an inner layer. The components of the core layer and the ratios thereof are: 100 parts of PVA, 60-100 parts of starch, 30-42 parts of a plasticizer, 0.4-1.0 part of a chemical modifier, and 0.2-0.6 part of a chain extender; the components of the surface layer and the inner layer and the ratios thereof are: 100 parts of PBAT, 30-50 parts of PHA, and 1-3 parts of a lubricant. Also disclosed is a preparation method for the multilayer biodegradable film. According to the multilayer biodegradable film prepared in the present invention, a film having good water-barrier properties is attached to each of the inner and outer surfaces of a PVA/starch film having good air tightness, so that a resulting film is good in both air tightness and waterproofness; moreover, the multilayer biodegradable film is completely biodegradable, is environmentally friendly, and is particularly suitable for food packaging.
Inventors:
CHEN CHANGPING (CN)
Application Number:
PCT/CN2020/107846
Publication Date:
February 10, 2022
Filing Date:
August 07, 2020
Export Citation:
Assignee:
NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INSTITUTE CO LTD (CN)
International Classes:
B32B27/36; B32B27/30; C08J5/18; C08L3/02; C08L67/02
Foreign References:
| CN110626038A | 2019-12-31 | |||
| CN107513180A | 2017-12-26 | |||
| EP3636434A1 | 2020-04-15 |
Attorney, Agent or Firm:
JIANGSU PHAEDO LAW FIRM (CN)
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